Function modHalf

src/lib/mod.js:16–20

* sanitized modulus function that always returns in the range [-d/2, d/2] * rather than (-d, 0] if v is negative

(v, d)

 * rather than (-d, 0] if v is negative
 */
function modHalf(v, d) {
    return Math.abs(v) > (d / 2) ?
        v - Math.round(v / d) * d :
        v;
}

module.exports = {
    mod: mod,